[LUCENE-1171] Make DocumentsWriter more robust on hitting OOM

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.3
• Fix Version/s: 2.4
• Component/s: core/index
• Lucene Fields: New
• Assignee: Michael McCandless
• Reporter: Michael McCandless
• Created: 08/Feb/08 21:00
• Updated: 28/Aug/22 11:46
• Resolved: 11/Feb/08 12:57

Description

I've been stress testing DocumentsWriter by indexing wikipedia, but not
giving enough memory to the JVM, in varying heap sizes to tickle the
different interesting cases. Sometimes DocumentsWriter can deadlock;
other times it will hit a subsequent NPE or AIOOBE or assertion
failure.

I've fixed all the cases I've found, and added some more asserts. Now
it just produces plain OOM exceptions. All changes are contained to
DocumentsWriter.java.

All tests pass. I plan to commit in a day or two!